Difference between revisions of "2009 Lecture 19"

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The adult eye has contributions from several different embryonic layers eventually forming neuronal, supportive connective tissue, optical structures, and muscular tissues.
 
The adult eye has contributions from several different embryonic layers eventually forming neuronal, supportive connective tissue, optical structures, and muscular tissues.
  
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==Development Timing==
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* Week 3 - beginning of "eye fields" of neural tube at the level of the proencephalon.
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* Week 4 - optic sulci form as indentations at the level of the diencephalon which extend towards and then contact the surface ectoderm.
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(These are Human embryonic timings, not clinical which is based on last menstral period +2 weeks)
  
 
==Retina==
 
==Retina==

Revision as of 07:34, 1 October 2009

Vision

--Mark Hill 12:49, 24 September 2009 (EST) This lecture is currently timetabled for a day that is a public holiday. The content will be covered as part of last week's laboratory. I will still add the appropriate lecture notes here.

Introduction

The adult eye has contributions from several different embryonic layers eventually forming neuronal, supportive connective tissue, optical structures, and muscular tissues.

Development Timing

  • Week 3 - beginning of "eye fields" of neural tube at the level of the proencephalon.
  • Week 4 - optic sulci form as indentations at the level of the diencephalon which extend towards and then contact the surface ectoderm.


(These are Human embryonic timings, not clinical which is based on last menstral period +2 weeks)

Retina

Vertebrates have ten identifiable layers formed from neurons, their processes (nerve fibers), membranes, photoreceptors and pigmented cells. Light must pass through nearly all these layers to the photoreceptors.

  1. Inner limiting membrane - Müller cell footplates.
  2. Nerve fiber layer - retinal ganglion axons eventually the optic nerve.
  3. Ganglion cell layer - neuronal cell bodies of retinal ganglion cells, their axons form the nerve fiber layer and eventually the optic nerve.
  4. Inner plexiform layer - another layer of neuronal processes.
  5. Inner nuclear layer - neuronal cell bodies
  6. Outer plexiform layer - another layer of neuronal processes.
  7. Outer nuclear layer - neuronal cell bodies
  8. External limiting membrane - layer separating inner segment portions of photoreceptors from their cell nuclei.
  9. Photoreceptor layer - rods and cones that convert light into signals.
  10. Retinal pigment epithelium.


Glossary Links

Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link

Course Content 2009

Embryology Introduction | Cell Division/Fertilization | Cell Division/Fertilization | Week 1&2 Development | Week 3 Development | Lab 2 | Mesoderm Development | Ectoderm, Early Neural, Neural Crest | Lab 3 | Early Vascular Development | Placenta | Lab 4 | Endoderm, Early Gastrointestinal | Respiratory Development | Lab 5 | Head Development | Neural Crest Development | Lab 6 | Musculoskeletal Development | Limb Development | Lab 7 | Kidney | Genital | Lab 8 | Sensory - Ear | Integumentary | Lab 9 | Sensory - Eye | Endocrine | Lab 10 | Late Vascular Development | Fetal | Lab 11 | Birth, Postnatal | Revision | Lab 12 | Lecture Audio | Course Timetable


Cite this page: Hill, M.A. (2021, June 18) Embryology 2009 Lecture 19. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/2009_Lecture_19

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© Dr Mark Hill 2021, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G